Collar connector



FIG. 1 is a top perspective view of a collar connector showing my new design.

FIG. 2 is a left side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a right side view thereof.

The broken lines in FIGS. 2 and 5 showing environment is for illustrative purposes on and form no part of the claimed design. 

CLAIM The ornamental design for collar connector, as shown and described. 